Home / 20,780.06-28,676.04-11,348.66

Finding the Fourth Proportional to 20,780.06, 28,676.04 and 11,348.66

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Solution

The fourth proportional to 20,780.06, 28,676.04 and 11,348.66 is: 15,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.06 : 28,676.04 = 11,348.66 : x
  2. Step 2: Convert to fraction form
    20,780.06/28,676.04 = 11,348.66/x
  3. Step 3: Cross multiply
    20,780.06x = 28,676.04 × 11,348.66
  4. Step 4: Simplify right side
    20,780.06x = 325,434,628.11
  5. Step 5: Solve for x
    x = 325,434,628.11/20,780.06
  6. Step 6: Final answer
    x = 15,660.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.